{
  "task_id": "ARCH-000003",
  "task_revision": 1,
  "architecture_revision": "ADR-0003",
  "base_repo_revision": "d0556695ffa1da8710a17e944d4396114a7afd6b",
  "risk_tier": "E",
  "intent": "Produce a proposal-only decision for fail-closed comparison of the complete Git change set with the active task packet allowed_change_scope before promotion.",
  "requirement_ids": ["INV-CHG-001", "INV-REC-001"],
  "allowed_change_scope": {
    "paths": [
      "docs/DIFF_SCOPE_GUARDRAIL_PROPOSAL.md",
      "dev/tasks/ARCH-000003-diff-scope-guardrail-proposal.json"
    ]
  },
  "forbidden_change_scope": {
    "paths": [
      "architecture/**",
      "ci/**",
      ".gitea/**",
      "security/**",
      "database/**",
      "modules/**",
      "contracts/**",
      "adapters/**",
      "cmd/**",
      "deploy/**",
      "tests/**",
      "dev/ACTIVE_TASK.json"
    ]
  },
  "allowed_architecture_delta": {
    "new_cross_module_dependencies": 0,
    "new_canonical_owners": 0,
    "new_privileges": 0
  },
  "semantic_owner": "proposal-only",
  "assumptions": [
    "Promotion must validate one explicit active task rather than infer or union task packets",
    "Historical task packets with abbreviated or non-resolvable bases remain immutable evidence and are not retroactively promoted",
    "Exact diff-scope validation supplements architecture authority and independent Tier E review; it cannot grant either"
  ],
  "acceptance_scenarios": [
    "proposal defines an explicit versioned active-task pointer",
    "proposal defines a valid immutable ancestor base requirement",
    "proposal covers committed, staged, unstaged, untracked, deleted and renamed paths",
    "proposal defines deterministic allowed path matching and fail-closed errors",
    "proposal protects the promotion workflow itself",
    "proposal defines a non-bypassable CI integration and bootstrap sequence",
    "no protected architecture, guardrail, workflow or implementation file is modified"
  ],
  "required_tests": [
    "architecture preflight",
    "diff-scope review"
  ],
  "terminal_gap_states": [
    "BLOCKED_BY_ARCHITECTURE_GAP",
    "BLOCKED_BY_SPEC_GAP",
    "BLOCKED_BY_CONFLICT"
  ]
}